Slide-valve for steam-engines



(No Model.)

LE GRAND SKINNER. SLIDE VALVE FOR STEAM ENGINES.

. I. M. P1 WEE.. I 0V V x hugmphcr. wmm m o. c.

Nrrnn STATES PATENT OFFICE.

LE GRAND sKInNnR, OFER'IE, PENNsYLvAnIA'.

S LlPE -V A LVE FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 287,878, dated November 6, 1883.

Application filed Oetoberfi, 1882. rNo model.) d

' it consists in certain improvements in the con-' struction,arrangement, and operation of the 1 supply and exhaust valves, as will hereinafter be fully setforth.

The primary object of this invention is to so arrange the valves as to shorten the passages I as much as possible, 'and thus bring the clearance-spaces down to a minimum area, and

' thereby save a considerable consumption of steam ,for it is well known that whatever steam is necessary to fill the clearance-spaces is lost, and therefore by reducing the length of the 2 passages so much is taken. from the space which hasto be filled with steam and less steam is consumed. I There are many secondary objects accomplished by my construction, which will appear hereinafter.

In the construction by whichl accomplish the object above named \the steam-chest extends the whole length of the cylinder, and is divided into two compartments, one of which is 3 5 for the live steam and the other for the exhaust, said compartments running lengthwise of the steam-chest.

.with two valves-one at each end and the seats of the valves in one compartment are set 40 at an angle to those inthe other compartment,

so that the valve-seats are at right angles, or about so, to the radii of the cylinder, which pass through the middle of the seats. Byobserving the arrangement shown in Fig. 2 of the drawings, it will'be seenthat by the arrangement just described the steam-passages A A are shorter than can be made by any other construction that can be made, except with a curved valve-seat. I

The invention is illustrated in the accompanying drawings as follows:

Figure 1 is a perspective view, showing an inafter.

-tobe made for their. seating. openings E in the cylinder are'large, and a Each compartment is provided,

engine-cylinder constructed in the manner above described, parts being broken away-to show the construction more perfectly; Fig. 2 is a vertical cross-section through the cylinder and steam-chest. Fig. 3 is a plan view, looking down into the steam-chest. Fig. 4 is a perspective view of the exhaust-valves and their surrounding parts, separated one from the other, but kept in relative position, except the rod 0, which is out of position;

A is the cylinder. A A" are the steam-passages. B is the steam-chest, and B B its compartments, I) being the partition. 0 O are the valve-rods. D D are the live-steam valves 10- eated in the live-steam chamber 13. D D are the exhaust-valves." The other parts shown will be referred to in proper connection here- 'ber being toward the cylinder, the construction of the valves can be the simplest possible. The pressure upon the exhaust-valves D D is from the cylinder, and special provision has The exhaustrabbet or other similar means is provided for the valves D, which settherein, to keep them from falling into the cylinder. These valves seat upon a cap or cover, F, which lies upon the openings E. In Fig. 1, in the foreground, the valve D alone is seen in the opening E, and in the background the'cover F is shown upon the opening. The covers F are provided with openings f, which are, in fact, the exhaustports. They each have a notch on one side for the pins d on the backs of the valves to move into when the valves are moved off of the openings or ports. The caps F are kept upon the openings E by stools G, the legs 9 of which i rest upon the four corners of the plates, and said legs having the proper difference in length, as seen, the tops of the stools lieparallel with the cover of the steam-chest, and set-screws H, passing through said cover and impinging upon the tops of the stools, hold the caps F firmly- .upon theopenings E. The valves D are free to be moved below the plates, the under sides of which, as before stat-ed, form the seats of these valves. The pins (1 on the backs of the valves D stick up through the plates F, and the valve-rod C connects therewith, as is clearly seen in Fig. 3. One of the advantages of this construction is, that the valve-seats can be replaced when worn without disturbing the cylinder. The plates F can be used in the livesteam chamber just as well as where shown; but in that case the valve would be on top, as the pressure is in the opposite direction. In place of the stools G and the screws H, the plates F can be secured in place by various other means, which will readily suggest themselves to a mechanic.

hat I claim as new is- 1. In a steam-engine cylinder, the combination of a steam-chamber having exhaust-ports, slotted plates covering said ports, and reciprocating valves below said slotted plates and 0011- nected to the reciprocating rod by pins passing through the slotted plates.

2. In a steam-engine cylinder, the combination of a steanrchest having a partition which divides said chest into inlet and exhaust ch ambers, having, respectively, inlet and'exhaust ports, reciprocating valves in the inlet-chamber held in place by the pressure of the steam, reciprocating valves in the exhaust-chamber held in place by slotted plates, which form seats for said valves, and a cover for said ch ambers, substantially as described.

3. In a steam-engine valve-chamber, the combination, substantially as shown, of the reciprocating valve D, the removable valveseating plate F, covering the port or passage E, and the stool G, and set-screw H, for securing said plate upon said opening.

4. In a steam-engine valve-chamber, the combination, substantially as shown, of the port-openings E E, removable valve-seating platesFF, with ports f f, covering and secured upon the openings E E, the valves D D, with pins (1 d, and the valve-rod C.

In testimony whereof I affix my signature in presence of two witnesses.

LE GRAND SKINNER.

Vitnesses:

.TNO. K. HALLOCK, Rom. H. Ion'rnn. 

